More than 30 published studies document ImmPower-AHCC’s ability to enhance overall immune protection. Now with added D3 to promote T-cell activation. Without proper quantities of vitamin D3, T-cells remain “naïve” and don’t provide the full protection required for good health. Contains 250 mg of AHCC and 750 IU D for a daily maintenance of immune support. 15 day to 1 month supply.